Polishing-machine.



HENRY RoErNSoN, oF SoUTH ORANGE, NEW JERSEY.

PoLISrrING-MACHINE.

To all whom it may concern: Y j

Be it known that I, HENRY ROBINSON, a citizen of the United States, residing in South Orange, in the ,county of Essexl and State of New Jersey, have invented a certain new anduseful Improvement in Pol.

ishing-Machines, of which the following is,

a specication. f y I y1 My present invention relates to a machine capable of being driven either by hand or power whereby knives andthe like may be rapidly and easily cleaned, scoured or polished. c Y

Another object .of the invention is the provision ofv a nmachine of the *class described which is composed of relatively few parts so contrived andI arranged as to be easily assembled or taken apart.

yAnother object of the invention is the provision of means .for regulating the distance between the polishing wheels and the pres-v sure of one upon the other ina manner and to such an eXtent as is required by the particular work in hand, andl whereby this regulation is made independent of the action of the wheels themselves. l

Further objects and advantages of this invention will appear hereinafter.

A preferred embodiment of my invention is illustrated in the accompanying drawings, wherein j A Figure 1 is a plan view of the machine as arranged to be driven by a motor-(not shown), Fig. 2 is a side elevation of the same, Fig. 3 is a sectional detail of a.pre ferred contact pad, and Fig. 4is-a sectional detail of a preferred clutch.

Upon the base or platform 10 are supported three standards, 11, 12 and 13, preferably placed as shown in Fig. 1. One polishingv wheel 14 is carried on the end of a hollow sleeve 15 which has al bearing in the standard 12, while the opposite polishing wheel 16 is carried by-a shaft 17 having its bearing in thestandard v13. VEach polishing wheel consists preferably of a cast'iron body hollowedon its outer face as indi-V cated by the dotted lines in Figel, and supplied around its rim with a suitable .contact pad whose preferred construction is hereinafter described. Through the center of the sleeve 15 extends the shaft 18, carrying a worm wheel 19 and a gear wheel 20 at its end. The worm wheel 19 is driven by the worm 21, on the shaft'of an electric motor, one end of which is shown at 22.

l' lSpecicaton of Letters Patent.

Application filed October 20, 1910.

serial No.1 588,079.

Anyl driving means inay' be used for the shaft 18. The sleeve 15,which is made capable ofy sliding longitudinally on v theyshaft 118, carries collars 23,V 24r between which turns Athe`loose collar 25, carrying pinsw26j,

Patented Jan. y1,6, 1,912'. n.

engagedlby forks 27y on the shorterarms 28 i 4of af lever pivoted beneath the base 10 atv 29. The longer arm 30 of the lever extends under the base 10 to where a bolt 31A passesk ythrough its extremity and upward through the base,above' which said bolt is pivotedy to a'cam 32 havingfa handle 33. A nut end ofthe arm 80, which is pressed downward by the spring 35.y p l Various meansma'y be used to. cause the sleeve 15 and disk 14 ,to turn with the drivl i r ing shaft 18, butI prefer the 'means'shown in l'twoV modified forms in Figs.' 1 and 4,

Y34 at the bottom of the bolt supports the y since this means contributesgreatly to ease' of assemblingthe parts. In Fig. 4, the bot` tom oflthe hollow portion of the vwheel 14,

is shown at 14, and is provided with a numu ber of sockets 36 bored around'the shaft 18.

Aclutch member 37 fixed to the end of the `shaft .18l by theset screw 38, is providedn withpins 39 entering t-hesockets '36. These sleeve 15 to slide upon the shaft 18 the re quired distance without` causing rotative 'engagement between the two to fbe rnterrupted The two Apolishing wheels 14-and 16 arecaused to rotate together in the sameV v direction yby the preferred means shown,

wherein the gear 2O`Vdrives a spiral-toethed gear 40 1o`n the cross shaft 41. This 'shaft drives a second spiral toothed gear 42l which Y i pins are madelong enough to permit the" faced with polishing pads, and the shafts 15')l and 17 'ofthese wheels are set at such a mu-v tual `anglethatthese padsmay be brought into contact at points in front of ythese wheels,-as shown in Figs. 1 and. 2. One of the features of my Vinvention has krelation to a preferred improved form of padused' inik this connection. This is best shown inl Figs.y

' 1 and 3. The rim of each wheel is provided with an 'annular' hollow or cavity 44 opening' towardy the front or face of the wheel at the bottom of which is ai groove 45 extending entirely around the wheel rim. The cavity` 44 is occupied by an annular cushion 46`havingan extension which enters the 'groove`45.V f'

This cushion is preferably made of live rub- 3 is introduced edge up between the revolving pads at the front of the machine, the friction of which presses the back of the knife down upon the rest 48 placed just in front of the point of contact of the pads. By

pushing the knife in and out between the pads, all parts of the blade may be brought in contact with them for cleaning or polishlng.

The degree of compression exerted by one pad on the other may be regulated and the wheels may be adjusted for articles of different sizes by turning the handle 33 to different positions. In the vertical position shown the spring 35 is allowed to depress the outer end of the arm 30 to a maximum extent, thus bringing the pads into firm contact. By tilting the handle 38 more and more out of the vertical position, the wheels can be gradually separated, and the cam 32 is so shaped that any position thus given to the wheel 14 will be preserved without the necessity of further attention. Vhen the machine is not in use, the wheels, are thus kept out of contact, which will lessen wear and tear.

What I claim isl. A polishing machine comprising in combination, two polishing wheels mounted upon axes at a suitable angle to each other and so placed as to be adapted to have the edge portion of their faces brought in contact and one of said wheels being movably mounted on its axis, a. bent lever pivoted vupon and extending under said base, a shifting fork at one end of said lever, adapted to produce movement of one of said wheels toward and away from the other, a stem rising from the opposite end of said lever through an opening in the base and a pivoted handle provided with a cam adapted to move said stem up and down for the purpose of controlling the movable wheels, substantially as described.

2. A polishing machine comprising in combination two polishing wheels mounted upon a suitable base, one of said wheels being movably mounted on its axis to permit of contact or separation of said wheels at will, a bent lever pivoted on and extending under said base, a shifting fork on one end of said lever, a stem rising from the opposite end of said lever through an opening in said base and a cam above said base pivoted to said stem, substantially as described.

3. A polishing machine comprising in combination a driving shaft, a sleeve thereon, a polishing wheel fixed to one end of said sleeve and having a hollow face provided with socket holes, a clutch member on the end of said shaft carrying pins adapted to enter and slide within said socket holes, a second wheel, and means for causing revolution of said two wheels in the same direction, substantially as described.

HENRY ROBINSON.

Titnessesz H. S. MAGKAYE, KATHARINE MEAD.

Gopes of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

